package cn.tedu;

import java.lang.reflect.Method;
import java.sql.Connection;
import java.sql.PreparedStatement;
import java.sql.ResultSet;
import java.sql.SQLException;
import java.util.Scanner;

public class Demo11 {
    public static void main(String[] args) {
        Scanner scan = new Scanner(System.in);
        System.out.println("请输入用户名:");
        String username = scan.nextLine();
        System.out.println("请输入密码:");
        String password = scan.nextLine();
        try (Connection connection = DBUtils.getConn()){
            String sql = "select password from user where username=?";
            PreparedStatement ps = connection.prepareStatement(sql);
            ps.setString(1,username);
            ResultSet rs = ps.executeQuery();
            if (rs.next()){
                String pw = rs.getString(1);
                if (pw.equals(password)) {
                    System.out.println("登录成功!");
                }else {
                    System.out.println("密码错误!");
                }
            }else {
                System.out.println("用户不存在!");
            }
        } catch (SQLException throwables) {
            throwables.printStackTrace();
        }
    }
}
